催化光度法测定痕量亚硝酸根研究──溴酸钾氧化二甲苯蓝FF体系  

STUDY ON THE METHOD OF CATALYTIC SPERTROPHOTOMITRIC DETERMINATION OF TRACE AMOUNTS NITRITE──THE SYSTEM OF OXIDATION XYLENE CYANOL FF BY PATASSIUM BROMATE

作　　者：许爱梅 訾言勤[1] 程听大[1] 

机构地区：[1]宿县地区环境监测站,合肥工业大学

出　　处：《合肥工业大学学报（自然科学版）》1995年第S1期140-143,共4页Journal of Hefei University of Technology：Natural Science

摘　　要：本文基于酸性介质中，痕量亚硝酸根催化溴酸钾氧化二甲苯蓝ＦＦ的高灵敏褪色反应，建立了一个测定痕量亚硝酸根的新方法。线性范围为２～４０ｎｇ／２５ｍｌ，检出限为９．４×１０－１１ｇ／ｍｌ。用于土壤样品和环境水样品中亚硝酸根的测定，均获得满意结果。catulytic oxidation xylene cyanol FF is proposed for detotmining trace amounts of nitrite. The new method is based on the fact that in acidic medium, the nitrite catalysed oxidation xylene cyanol PF by potassium bromate has a high sensitivity of decoloration reactions. The concentration linear range is 2～40ng/25ml, detection limit is 9. 4×10-11g/ml. This method has been applied to the determination of nitrite in the sample of earth and environmental water with satisfactory results.

关 键 词：催化光度法 亚硝酸根 溴酸钾 二甲苯蓝FF 

分 类 号：O657.3[理学—分析化学]